code: def test_00_check_connection(self):
      conn = self.handler.check_connection()
      assert conn.success
  
imports: import os
  import time
  import unittest
  import tempfile
  from mindsdb.migrations import migrate
  from mindsdb.utilities.config import Config
  from mindsdb.integrations.utilities.test_utils import HandlerControllerMock, PG_HANDLER_NAME, PG_CONNECTION_DATA
  from mindsdb.interfaces.database.integrations import integration_controller
  from mindsdb.integrations.handlers.lightwood_handler.lightwood_handler.lightwood_handler import LightwoodHandler
  from mindsdb.interfaces.storage.fs import FsStore
  from mindsdb.interfaces.model.model_controller import ModelController
  from mindsdb.integrations.libs.response import RESPONSE_TYPE
  import mindsdb.interfaces.storage.db
label_desc: Use image node_id 2 for calling the LightwoodHandlerTest obj's underlying member method code with example usage: obj.test_00_check_connection() without return types